The Screaming ® O Ling-O brings extra excitement to any bedroom by adding a vibrating tongue twist to oral action for him or her. The Ling O vibrating tongue ring is designed to fit any size or shape the tongue and stays in place with under tongue snug knobs, a ridged band and flat surface to keep the tongue from curling . Fit the ring below at the base of the tongue, with bullet at the top of the tongue. Press button to turn on. The battery life is 40+ minutes. Disposable fun !